The advisory discusses a homelab setup that involves converting a desktop PC with a 12th Gen Core i5 processor into a media server using Ubuntu Server. The system includes hardware components such as an Asus B660M motherboard, Samsung NVMe SSDs, HDDs, and Noctua fans for cooling. The software stack includes Jellyfin for media streaming and Samba for file sharing. An auto-suspend script has been implemented to conserve power when the server is not in use. However, the setup lacks explicit security measures such as network segmentation or secure configuration practices, which could expose it to vulnerabilities like unauthorized access over the network or insecure configurations that could be exploited by attackers. Engineers and sysadmins should take note of the potential risks associated with default installations and ensure robust security measures are implemented.
- Ubuntu Server
- Jellyfin media server
- Samba file sharing
- Configure the firewall to allow only necessary services and deny all other inbound traffic: `sudo ufw default deny incoming` followed by rules for specific services.
- Enable SSH key-based authentication and disable password login in `/etc/ssh/sshd_config`: `PasswordAuthentication no`, then restart SSH service with `sudo systemctl restart sshd`.
- Update Jellyfin to the latest stable version and configure it securely, following best practices such as enabling HTTPS and securing API access: `sudo apt-get update && sudo apt-get install jellyfin`
- Secure Samba configuration by setting strong passwords for users, limiting network access in `/etc/samba/smb.conf`: `security = user`, enable encrypted connections if possible.
The impact on common homelab stacks includes potential unauthorized access to media content or file shares due to default configurations and lack of network segmentation. Specific software versions like Ubuntu Server, Jellyfin (latest stable), and Samba should be configured securely.